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millfork/docs/stdlib/input.md
2018-12-17 17:18:29 +01:00

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## joy
The module contains global variables representing the state of the one-button joystick.
If the program is not using any joystick driver, the state of these variables is undefined.
#### `sbyte input_dx`
Horizontal joystick movement. 1 if right, -1 if left, 0 if neither.
#### `sbyte input_dy`
Vertical joystick movement. 1 if right, -1 if left, 0 if neither.
#### `byte input_btn`
1 if main button pressed, 0 id not pressed.
#### `void reset_joy()`
Resets the state variables.
For platforms with more than one button, this resets only the main button state.
## null_joy_default
This module set the default joystick to no joystick.
#### `alias read_joy`
## mouse
The `mouse` module automatically imports the `x_coord` module.
The module contains global variables representing the state of the mouse.
If the program is not using any mouse driver, the state of these variables is undefined.
#### `x_coord mouse_x`
Mouse X position.
#### `byte mouse_y`
Mouse Y position.
#### `byte mouse_lbm`
1 if the left mouse button is being pressed, 0 otherwise
#### `byte mouse_rbm`
1 if the right mouse button is being pressed, 0 otherwise
## `x_coord` module
#### `alias x_coord`
The type for representing horizontal screen coordinates.
It's `byte` if the screen is 256 pixels wide or less,
or `word` if the screen is more that 256 pixels wide.
## null_mouse_default
This module set the default joystick to no joystick.
#### `void read_mouse()`